window.onload = function () {
    var xhr = new XMLHttpRequest()
    xhr.open(`get`,`/studio/album/candidate.json` + location.search)
    xhr.onload = function () {
        var data = JSON.parse(xhr.responseText)
        document.querySelector(`#aid`).value = data.aid
        var oContainer = document.querySelector(`.container`)
        var list = data.trackList
        for (var i in list) {
            var a = list[i]
            var html = `<div><input type="checkbox" name="add-tid" value="${a.tid}">${a.title}</div>`
            oContainer.innerHTML += html
        }
    }
    xhr.send()
}